removed currently unused support libraries

Author: Sriya Pratipati

utils/bazel/llvm-project-overlay/libc/BUILD.bazel

@@ -298,24 +298,6 @@ libc_support_library(
     deps = [":hdr_stdlib_overlay"],
 )
 
-libc_support_library(
-    name = "types_char32_t",
-    hdrs = ["hdr/types/char32_t.h"],
-    deps = [
-        ":hdr_uchar_overlay",
-    ],
-)
-
-libc_support_library(
-    name = "hdr_uchar_overlay",
-    hdrs = ["hdr/uchar_overlay.h"],
-)
-
-libc_support_library(
-    name = "types_char8_t",
-    hdrs = ["hdr/types/char8_t.h"],
-)
-
 libc_support_library(
     name = "types_clockid_t",
     hdrs = ["hdr/types/clockid_t.h"],
@@ -354,11 +336,6 @@ libc_support_library(
     deps = [":hdr_stdlib_overlay"],
 )
 
-libc_support_library(
-    name = "types_mbstate_t",
-    hdrs = ["hdr/types/mbstate_t.h"],
-)
-
 libc_support_library(
     name = "types_mode_t",
     hdrs = ["hdr/types/mode_t.h"],
@@ -1688,6 +1665,16 @@ libc_support_library(
     ],
 )
 
+libc_support_library(
+    name = "__support_wctype_utils",
+    hdrs = ["src/__support/wctype_utils.h"],
+    deps = [
+        ":__support_cpp_optional",
+        ":__support_macros_attributes",
+        ":__support_macros_config",
+    ],
+)
+
 ########################## externally shared targets ###########################
 
 libc_header_library(
@@ -5731,16 +5718,6 @@ libc_function(
 
 ############################## wchar targets ###############################
 
-libc_support_library(
-    name = "__support_wctype_utils",
-    hdrs = ["src/__support/wctype_utils.h"],
-    deps = [
-        ":__support_cpp_optional",
-        ":__support_macros_attributes",
-        ":__support_macros_config",
-    ],
-)
-
 libc_function(
     name = "btowc",
     srcs = ["src/wchar/btowc.cpp"],