[docs] Stop using the term 'Xamarin'. (#20451)

Stop using the term 'Xamarin' in our error messages.

🙈 🙊 🙉

Note: this may not be complete, since we compute error messages in numerous
places, and those aren't fixed here (if there are any that still says
'Xamarin' in any way).

---------

Co-authored-by: Michael Cummings (MSFT) <[email protected]>

msbuild/Xamarin.Localization.MSBuild/MSBStrings.resx

@@ -106,7 +106,6 @@
     <data name="W0020" xml:space="preserve">
         <value>Supported iPhone orientations are not matched pairs
         </value>
-        <comment>The iPhone orientation settings do not match iPad, see: https://xamarin.github.io/bugzilla-archives/85/850/bug.html</comment>
     </data>
 
     <data name="W0021" xml:space="preserve">
@@ -117,7 +116,6 @@
     <data name="W0022" xml:space="preserve">
         <value>Supported iPad orientations are not matched pairs
         </value>
-        <comment>The iPad orientation settings do not match iPhone, see: https://xamarin.github.io/bugzilla-archives/85/850/bug.html</comment>
     </data>
 
     <data name="E0023" xml:space="preserve">
@@ -213,7 +211,7 @@
     </data>
 
     <data name="E0053" xml:space="preserve">
-        <value>Target architecture ARMv6 is no longer supported in Xamarin.iOS. Please select a supported architecture.
+        <value>Target architecture ARMv6 is no longer supported. Please select a supported architecture.
         </value>
     </data>
 
@@ -881,15 +879,15 @@
     </data>
 
     <data name="E0183" xml:space="preserve">
-        <value>An error occurred while trying to verify the compatibility between Xcode and Xamarin.iOS</value>
+        <value>An error occurred while trying to verify the compatibility between Xcode and the .NET SDK</value>
     </data>
 
     <data name="E0184" xml:space="preserve">
         <value>The project was built with a version of Xcode ({0}) that is not compatible which may result in unexpected warnings or errors. Please install Xcode '{1}' or visit the documentation to learn more.</value>
     </data>
 
     <data name="E0185" xml:space="preserve">
-        <value>An error occurred while trying to verify the compatibility between Xcode and Xamarin.iOS. Details: {0}
+        <value>An error occurred while trying to verify the compatibility between Xcode and the .NET SDK. Details: {0}
         </value>
     </data>
 
@@ -1260,6 +1258,7 @@
 
     <!-- E7068: not in use anymore -->
 
+    <!-- legacy only error -->
     <data name="E7069" xml:space="preserve">
         <value>Xamarin.iOS 14+ does not support watchOS 1 apps. Please migrate your project to watchOS 2+.</value>
     </data>

src/Resources.resx

@@ -171,10 +171,6 @@
 		<value>A target framework (--target-framework) must be specified.</value>
 	</data>
 
-	<data name="BI0087" xml:space="preserve">
-		<value>Xamarin.Mac Classic binding projects are not supported anymore. Please upgrade the binding project to a Xamarin.Mac Unified binding project.</value>
-	</data>
-
 	<data name="BI0088" xml:space="preserve">
 		<value>Internal error: don't know how to create ref/out (input) code for {0} in {1}. Please file a bug report with a test case (https://github.com/xamarin/xamarin-macios/issues/new).</value>
 	</data>

tests/mtouch/MTouch.cs

@@ -1804,7 +1804,7 @@ static void Main () {
 
 				mtouch.FastDev = true;
 				mtouch.AssertExecute (MTouchAction.BuildDev, "first build");
-				mtouch.AssertWarning (127, "Incremental builds have been disabled because this version of Xamarin.iOS does not support incremental builds in projects that include more than one third-party binding libraries.");
+				mtouch.AssertWarning (127, "Incremental builds have been disabled because incremental builds are currently not supported in projects that include more than one third-party binding library.");
 			}
 		}
 

tests/mtouch/RegistrarTest.cs

@@ -459,8 +459,8 @@ class C : NSObject {
 				mtouch.Linker = MTouchLinker.DontLink;
 				mtouch.Registrar = MTouchRegistrar.Static;
 				mtouch.AssertExecuteFailure ();
-				mtouch.AssertError (4141, "Cannot register the selector 'retain' on the member 'C.Retain' because Xamarin.iOS implicitly registers this selector.", "testApp.cs", 5);
-				mtouch.AssertError (4141, "Cannot register the selector 'release' on the member 'C.Release' because Xamarin.iOS implicitly registers this selector.", "testApp.cs", 8);
+				mtouch.AssertError (4141, "Cannot register the selector 'retain' on the member 'C.Retain' because this selector is already implicitly registered.", "testApp.cs", 5);
+				mtouch.AssertError (4141, "Cannot register the selector 'release' on the member 'C.Release' because this selector is already implicitly registered.", "testApp.cs", 8);
 				mtouch.AssertErrorCount (2);
 				mtouch.AssertNoWarnings ();
 			}