Remove OTLP Exporter Grpc project (#4719)

OpenTelemetry.proj

@@ -7,8 +7,6 @@
     <!-- Not pack SemanticConventions project for now -->
     <SolutionProjects Remove="src\OpenTelemetry.SemanticConventions\OpenTelemetry.SemanticConventions.csproj" />
     <PackProjects Remove="src\OpenTelemetry.SemanticConventions\OpenTelemetry.SemanticConventions.csproj" />
-    <SolutionProjects Remove="src\OpenTelemetry.Exporter.OpenTelemetryProtocol.Grpc\OpenTelemetry.Exporter.OpenTelemetryProtocol.Grpc.csproj" />
-    <PackProjects Remove="src\OpenTelemetry.Exporter.OpenTelemetryProtocol.Grpc\OpenTelemetry.Exporter.OpenTelemetryProtocol.Grpc.csproj" />
 
     <!-- Skip building these projects when publish packages workflow runs as these projects need to dependupon instrumentation libraries taking a project reference
     instead of  package reference on API/SDK-->

OpenTelemetry.sln

@@ -238,8 +238,6 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TestApp.AspNetCore", "test\
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "redaction", "docs\logs\redaction\redaction.csproj", "{A2DF46DE-50D7-4887-8C9D-4BD79CA19FAA}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "OpenTelemetry.Exporter.OpenTelemetryProtocol.Grpc", "src\OpenTelemetry.Exporter.OpenTelemetryProtocol.Grpc\OpenTelemetry.Exporter.OpenTelemetryProtocol.Grpc.csproj", "{7263001A-49F8-4C3C-AAA8-998F12DAAF64}"
-EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "OpenTelemetry.Exporter.Console.Tests", "test\OpenTelemetry.Exporter.Console.Tests\OpenTelemetry.Exporter.Console.Tests.csproj", "{011E70E1-152A-47BB-AF83-12DD12B125ED}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "OpenTelemetry.Api.ProviderBuilderExtensions", "src\OpenTelemetry.Api.ProviderBuilderExtensions\OpenTelemetry.Api.ProviderBuilderExtensions.csproj", "{171A87CB-393C-4296-913F-E704CD8CEAE9}"
@@ -282,7 +280,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Shared", "Shared", "{A49299
 		src\Shared\StatusHelper.cs = src\Shared\StatusHelper.cs
 		src\Shared\TagAndValueTransformer.cs = src\Shared\TagAndValueTransformer.cs
 		src\Shared\TagTransformer.cs = src\Shared\TagTransformer.cs
-		src\Shared\TagTransformerJsonHelper.cs = src\Shared\TagTransformerJsonHelper.cs
 	EndProjectSection
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "DiagnosticSourceInstrumentation", "DiagnosticSourceInstrumentation", "{28F3EC79-660C-4659-8B73-F90DC1173316}"
@@ -311,6 +308,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Shims", "Shims", "{A0CB9A10
 	ProjectSection(SolutionItems) = preProject
 		src\Shared\Shims\IsExternalInit.cs = src\Shared\Shims\IsExternalInit.cs
 		src\Shared\Shims\NullableAttributes.cs = src\Shared\Shims\NullableAttributes.cs
+		src\Shared\Shims\UnconditionalSuppressMessageAttribute.cs = src\Shared\Shims\UnconditionalSuppressMessageAttribute.cs
 	EndProjectSection
 EndProject
 Global
@@ -551,10 +549,6 @@ Global
 		{A2DF46DE-50D7-4887-8C9D-4BD79CA19FAA}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{A2DF46DE-50D7-4887-8C9D-4BD79CA19FAA}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A2DF46DE-50D7-4887-8C9D-4BD79CA19FAA}.Release|Any CPU.Build.0 = Release|Any CPU
-		{7263001A-49F8-4C3C-AAA8-998F12DAAF64}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{7263001A-49F8-4C3C-AAA8-998F12DAAF64}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{7263001A-49F8-4C3C-AAA8-998F12DAAF64}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{7263001A-49F8-4C3C-AAA8-998F12DAAF64}.Release|Any CPU.Build.0 = Release|Any CPU
 		{011E70E1-152A-47BB-AF83-12DD12B125ED}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{011E70E1-152A-47BB-AF83-12DD12B125ED}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{011E70E1-152A-47BB-AF83-12DD12B125ED}.Release|Any CPU.ActiveCfg = Release|Any CPU