Remove SuppressGCTransition attribute from SPCL

Author: AaronRobinsonMSFT

src/System.Private.CoreLib/shared/Interop/Windows/Kernel32/Interop.GetCurrentProcessId.cs

@@ -9,7 +9,6 @@ internal static partial class Interop
     internal static partial class Kernel32
     {
         [DllImport(Libraries.Kernel32)]
-        [SuppressGCTransition]
         internal static extern uint GetCurrentProcessId();
     }
 

src/System.Private.CoreLib/shared/Interop/Windows/Kernel32/Interop.GetCurrentThreadId.cs

@@ -10,7 +10,6 @@ internal static partial class Interop
     internal static partial class Kernel32
     {
         [DllImport(Libraries.Kernel32, ExactSpelling = true)]
-        [SuppressGCTransition]
         public static extern int GetCurrentThreadId();
     }
 }

src/System.Private.CoreLib/shared/Interop/Windows/Kernel32/Interop.GetStdHandle.cs

@@ -10,7 +10,6 @@ internal static partial class Interop
     internal static partial class Kernel32
     {
         [DllImport(Libraries.Kernel32)]
-        [SuppressGCTransition]
         internal static extern IntPtr GetStdHandle(int nStdHandle);  // param is NOT a handle, but it returns one!
     }
 }

src/System.Private.CoreLib/shared/Interop/Windows/Kernel32/Interop.SetThreadErrorMode.cs

@@ -9,7 +9,6 @@ internal static partial class Interop
     internal static partial class Kernel32
     {
         [DllImport(Libraries.Kernel32, SetLastError = true, ExactSpelling = true)]
-        [SuppressGCTransition]
         internal static extern bool SetThreadErrorMode(uint dwNewMode, out uint lpOldMode);
 
         internal const uint SEM_FAILCRITICALERRORS = 1;