[Breaking] Reduce the number of transitive dependencies attached

This improves the restore and build performance of projects creating generators.

build/Uno.SourceGeneration.nuspec

@@ -16,12 +16,6 @@
 		<dependencies>
 			<group>
 				<dependency id="Microsoft.Build" version="14.3.0" />
-				<dependency id="Microsoft.Build.Engine" version="14.3.0" />
-				<dependency id="Microsoft.Build.Tasks.Core" version="14.3.0" />
-				<dependency id="Microsoft.CodeAnalysis" version="1.3.2" />
-				<dependency id="Microsoft.CodeAnalysis.Common" version="1.3.2" />
-				<dependency id="Microsoft.CodeAnalysis.CSharp" version="1.3.2" />
-				<dependency id="Microsoft.CodeAnalysis.CSharp.Workspaces" version="1.3.2" />
 				<dependency id="Microsoft.CodeAnalysis.Workspaces.Common" version="1.3.2" />
 			</group>
 		</dependencies>

doc/ReleaseNotes/_ReleaseNotes.md

@@ -5,6 +5,11 @@
 ### Features
 
 ### Breaking changes
+* This update removes unused dependencies, to improve the nuget restore time :
+    * Microsoft.Build.Engine
+    * Microsoft.Build.Tasks.Core
+    * Microsoft.CodeAnalysis
+  You may have to add those dependencies manually if your code relied in those, or one of their dependencies.
 
 ### Bug fixes
 

src/Uno.SourceGeneration/Uno.SourceGeneration.csproj

@@ -10,44 +10,12 @@
   <ItemGroup Condition="'$(TargetFramework)'=='net461'">
 	<PackageReference Include="Microsoft.Build">
 	  <Version>14.3.0</Version>
-      <ExcludeAssets>runtime</ExcludeAssets>
-	</PackageReference>
-	<PackageReference Include="Microsoft.Build.Utilities.Core">
-	  <Version>14.3.0</Version>
-      <ExcludeAssets>runtime</ExcludeAssets>
-	</PackageReference>
-	<PackageReference Include="Microsoft.CodeAnalysis">
-	  <Version>1.3.1</Version>
-      <ExcludeAssets>runtime</ExcludeAssets>
-	</PackageReference>
-	<PackageReference Include="Microsoft.CodeAnalysis.Common">
-	  <Version>1.3.1</Version>
-      <ExcludeAssets>runtime</ExcludeAssets>
-	</PackageReference>
-	<PackageReference Include="Microsoft.CodeAnalysis.CSharp">
-	  <Version>1.3.1</Version>
-      <ExcludeAssets>runtime</ExcludeAssets>
-	</PackageReference>
-	<PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces">
-	  <Version>1.3.1</Version>
-      <ExcludeAssets>runtime</ExcludeAssets>
-	</PackageReference>
-	<PackageReference Include="Microsoft.CodeAnalysis.VisualBasic">
-	  <Version>1.3.1</Version>
-      <ExcludeAssets>runtime</ExcludeAssets>
-	</PackageReference>
-	<PackageReference Include="Microsoft.CodeAnalysis.VisualBasic.Workspaces">
-	  <Version>1.3.1</Version>
       <ExcludeAssets>runtime</ExcludeAssets>
 	</PackageReference>
 	<PackageReference Include="Microsoft.CodeAnalysis.Workspaces.Common">
 	  <Version>1.3.1</Version>
       <ExcludeAssets>runtime</ExcludeAssets>
 	</PackageReference>
-	<PackageReference Include="System.ValueTuple">
-	  <Version>4.3.0</Version>
-      <ExcludeAssets>runtime</ExcludeAssets>
-	</PackageReference>
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)'=='netcoreapp2.1'">
@@ -56,25 +24,8 @@
 	  <Version>15.4.8</Version>
 	  <ExcludeAssets>runtime</ExcludeAssets>
 	</PackageReference>
-	<PackageReference Include="Microsoft.Build.Utilities.Core">
-	  <Version>15.4.8</Version>
-	  <ExcludeAssets>runtime</ExcludeAssets>
-	</PackageReference>
-	<PackageReference Include="Microsoft.CodeAnalysis">
-	  <Version>2.10.0</Version>
-	</PackageReference>
-	<PackageReference Include="Microsoft.CodeAnalysis.Common">
-	  <Version>2.10.0</Version>
-	</PackageReference>
-	<PackageReference Include="Microsoft.CodeAnalysis.CSharp">
-	  <Version>2.10.0</Version>
-	</PackageReference>
-	<PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces">
-	  <Version>2.10.0</Version>
-	</PackageReference>
 	<PackageReference Include="Microsoft.CodeAnalysis.Workspaces.Common">
 	  <Version>2.10.0</Version>
 	</PackageReference>
-	<PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="2.10.0" />
   </ItemGroup>
 </Project>