[NFCI] Clean up idempotent stack pop for inline context (llvm#141544)

In the top-of-tree, the stack pops at L414-416 [1] are no-op since there
are prior stack pops at L400-402.

[1]
https://github.com/llvm/llvm-project/blame/e015626f189dc76f8df9fdc25a47638c6a2f3feb/llvm/lib/ProfileData/SampleProfReader.cpp#L414-L416
[2]
https://github.com/llvm/llvm-project/blame/e015626f189dc76f8df9fdc25a47638c6a2f3feb/llvm/lib/ProfileData/SampleProfReader.cpp#L400-L402

Author: mingmingl-llvm

llvm/lib/ProfileData/SampleProfReader.cpp

@@ -411,9 +411,6 @@ std::error_code SampleProfileReaderText::readImpl() {
         break;
       }
       case LineType::BodyProfile: {
-        while (InlineStack.size() > Depth) {
-          InlineStack.pop_back();
-        }
         FunctionSamples &FProfile = *InlineStack.back();
         for (const auto &name_count : TargetCountMap) {
           mergeSampleProfErrors(Result, FProfile.addCalledTargetSamples(