Removes false termux support

This was a funny joke that this was here, but it is fundamentally
incompatible with what we're doing. All those users are running proot
anyway because of how broken running under termux directly is.

Just remove this from here.

Scripts/GenerateSyscallNumbers.py

@@ -60,12 +60,6 @@ DefinitionRenameDict = {
     "pread64": "pread_64",
     "pwrite64": "pwrite_64",
     "prlimit64": "prlimit_64",
-    # Shm symbols conflict with termux defines and FEX's syscall token pasting.
-    # Underscore at the start to avoid name collision
-    "shmget": "_shmget",
-    "shmctl": "_shmctl",
-    "shmat": "_shmat",
-    "shmdt": "_shmdt",
     # musl/Alpine Linux defines `fstatat64` as a define that points to `fstatat`.
     # Rename it to avoid global define conflicts.
     "fstatat64": "fstatat_64",