[Support] Remove redundant declarations (NFC)

[kazutakahirata]

In C++17, static constexpr members are implicitly inline, so they no
longer require an out-of-line definition.

Identified with readability-redundant-declaration.

[llvmbot]

@llvm/pr-subscribers-llvm-support

Author: Kazu Hirata (kazutakahirata)

Changes

In C++17, static constexpr members are implicitly inline, so they no
longer require an out-of-line definition.

Identified with readability-redundant-declaration.

---

Full diff: https://github.com/llvm/llvm-project/pull/166106.diff

2 Files Affected:

• (modified) llvm/lib/Support/BranchProbability.cpp (-2)
• (modified) llvm/unittests/Support/raw_ostream_proxy_test.cpp (-2)

diff --git a/llvm/lib/Support/BranchProbability.cpp b/llvm/lib/Support/BranchProbability.cpp
index ea42f34b58645..143e58a05d3b7 100644
--- a/llvm/lib/Support/BranchProbability.cpp
+++ b/llvm/lib/Support/BranchProbability.cpp
@@ -20,8 +20,6 @@
 
 using namespace llvm;
 
-constexpr uint32_t BranchProbability::D;
-
 raw_ostream &BranchProbability::print(raw_ostream &OS) const {
   if (isUnknown())
     return OS << "?%";
diff --git a/llvm/unittests/Support/raw_ostream_proxy_test.cpp b/llvm/unittests/Support/raw_ostream_proxy_test.cpp
index 864dda712aac8..446e64aa1ff59 100644
--- a/llvm/unittests/Support/raw_ostream_proxy_test.cpp
+++ b/llvm/unittests/Support/raw_ostream_proxy_test.cpp
@@ -40,8 +40,6 @@ class BufferedNoPwriteSmallVectorStream : public raw_ostream {
   bool IsDisplayed = false;
 };
 
-constexpr size_t BufferedNoPwriteSmallVectorStream::PreferredBufferSize;
-
 TEST(raw_ostream_proxyTest, write) {
   // Besides confirming that "write" works, this test confirms that the proxy
   // takes on the buffer from the stream it's proxying, such that writes to the