[llvm] [orc-rt] Remove redundant extern keyword. (PR #222619)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions h -- orc-rt/include/orc-rt-c/support/Logging.h --diff_from_common_commit
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``````````diff
diff --git a/orc-rt/include/orc-rt-c/support/Logging.h b/orc-rt/include/orc-rt-c/support/Logging.h
index 4e2a0983d..a52ffe635 100644
--- a/orc-rt/include/orc-rt-c/support/Logging.h
+++ b/orc-rt/include/orc-rt-c/support/Logging.h
@@ -234,8 +234,7 @@ ORC_RT_C_EXPORT void orc_rt_log_printf(orc_rt_log_Level Level,
  * are filled lazily (and read) atomically by orc_rt_log_osLogHandle. An
  * implementation detail of that accessor; do not use directly.
  */
-ORC_RT_C_EXPORT os_log_t
-    orc_rt_log_OSLogHandles[orc_rt_log_Category_Count];
+ORC_RT_C_EXPORT os_log_t orc_rt_log_OSLogHandles[orc_rt_log_Category_Count];
 
 /*
  * Cold path for orc_rt_log_osLogHandle: creates the handle for Category (in the

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https://github.com/llvm/llvm-project/pull/222619