Remove shared projects from Stride.Runtime.slnf

Shared projects (.shproj) are included implicitly via projitems imports
and don't need to be listed in solution filters. Stride.Refactor.shproj
had no Project entry in Stride.sln, causing MSB5028 during CI builds.

Author: Kryptos-FR

build/Stride.Runtime.slnf

@@ -21,16 +21,14 @@
       "..\\sources\\engine\\Stride.Shaders.Compiler\\Stride.Shaders.Compiler.csproj",
       "..\\sources\\engine\\Stride.Shaders.Parser\\Stride.Shaders.Parser.csproj",
       "..\\sources\\engine\\Stride.Shaders\\Stride.Shaders.csproj",
-      "..\\sources\\engine\\Stride.Shared\\Refactor\\Stride.Refactor.shproj",
       "..\\sources\\engine\\Stride.SpriteStudio.Runtime\\Stride.SpriteStudio.Runtime.csproj",
       "..\\sources\\engine\\Stride.UI\\Stride.UI.csproj",
       "..\\sources\\engine\\Stride.Video\\Stride.Video.csproj",
       "..\\sources\\engine\\Stride.VirtualReality\\Stride.VirtualReality.csproj",
       "..\\sources\\engine\\Stride.Voxels\\Stride.Voxels.csproj",
       "..\\sources\\engine\\Stride\\Stride.csproj",
       "..\\sources\\shaders\\Irony\\Irony.csproj",
-      "..\\sources\\shaders\\Stride.Core.Shaders\\Stride.Core.Shaders.csproj",
-      "..\\sources\\shared\\Stride.Core.ShellHelper\\Stride.Core.ShellHelper.shproj"
+      "..\\sources\\shaders\\Stride.Core.Shaders\\Stride.Core.Shaders.csproj"
     ]
   }
 }