ntdll-Activation_Context: Remove patch.

This was originally the third patch in a series, introduced by ec4e719cd6. The
first patch and the series itself was written by Mark Jansen and focused on an
incorrect handling of NULL in QueryActCtx(). It's not clear what those were
actually for, but they're upstream now.

My guess is that Sebastian noticed this "bug" while writing tests and wrote the
patch to fix it, as it's an easy one-liner. My guess is that he never submitted
it upstream either because it wasn't clearly correct (e.g. he wanted to actually
implement ACTIVATION_CONTEXT_SECTION_ASSEMBLY_INFORMATION) or because of
disagreements with upstream over project direction. As it happens there is a way
to get ACTIVATION_CONTEXT_SECTION_ASSEMBLY_INFORMATION to return valid data—pass
a NULL or empty string as the section name.

Anyway, the patch is likely to have never actually helped anything, and even if
it did, it's a one-liner with a FIXME message already attached, and so won't be
hard to debug again if necessary.

patches/patchinstall.sh

@@ -148,7 +148,6 @@ patch_enable_all ()
 	enable_msvcrt_Math_Precision="$1"
 	enable_msxml3_FreeThreadedXMLHTTP60="$1"
 	enable_ntdll_APC_Performance="$1"
-	enable_ntdll_Activation_Context="$1"
 	enable_ntdll_ApiSetMap="$1"
 	enable_ntdll_Builtin_Prot="$1"
 	enable_ntdll_CriticalSection="$1"
@@ -501,9 +500,6 @@ patch_enable ()
 		ntdll-APC_Performance)
 			enable_ntdll_APC_Performance="$2"
 			;;
-		ntdll-Activation_Context)
-			enable_ntdll_Activation_Context="$2"
-			;;
 		ntdll-ApiSetMap)
 			enable_ntdll_ApiSetMap="$2"
 			;;
@@ -2790,15 +2786,6 @@ if test "$enable_ntdll_APC_Performance" -eq 1; then
 	patch_apply ntdll-APC_Performance/0001-ntdll-Reuse-old-async-fileio-structures-if-possible.patch
 fi
 
-# Patchset ntdll-Activation_Context
-# |
-# | Modified files:
-# |   *	dlls/kernel32/tests/actctx.c, dlls/ntdll/actctx.c
-# |
-if test "$enable_ntdll_Activation_Context" -eq 1; then
-	patch_apply ntdll-Activation_Context/0001-ntdll-Fix-return-value-for-missing-ACTIVATION_CONTEX.patch
-fi
-
 # Patchset ntdll-ApiSetMap
 # |
 # | This patchset fixes the following Wine bugs: