[llvm] [NFC][BOLT] clean up unused option '--cu-processing-batch-size' (PR #204515)

[Amir Ayupov via llvm-commits]

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@@ -379,12 +379,9 @@ static cl::opt<bool>
                     cl::ZeroOrMore, cl::Hidden, cl::init(false),
                     cl::cat(BoltCategory));
 
-static cl::opt<unsigned> BatchSize(
-    "cu-processing-batch-size",
-    cl::desc(
-        "Specifies the size of batches for processing CUs. Higher number has "
-        "better performance, but more memory usage. Default value is 1."),
-    cl::Hidden, cl::init(1), cl::cat(BoltCategory));
+static cl::opt<unsigned> BatchSize("cu-processing-batch-size",
+                                   cl::desc("Now it is not used."), cl::Hidden,
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aaupov wrote:

Please print a deprecation warning if it's set.

https://github.com/llvm/llvm-project/pull/204515