NFC: remove two instances of deprecated capture

```
 warning: implicit capture of 'this' with a capture default of '=' is deprecated [-Wdeprecated-this-capture]
```

Author: j2kun

llvm/lib/Support/Parallel.cpp

@@ -60,7 +60,7 @@ class ThreadPoolExecutor : public Executor {
     auto &Thread0 = Threads[0];
     Thread0 = std::thread([this, S] {
       for (unsigned I = 1; I < ThreadCount; ++I) {
-        Threads.emplace_back([=] { work(S, I); });
+        Threads.emplace_back([this, S, I] { work(S, I); });
         if (Stop)
           break;
       }

mlir/lib/Transforms/InlinerPass.cpp

@@ -138,9 +138,10 @@ void InlinerPass::runOnOperation() {
   }
 
   // By default, assume that any inlining is profitable.
-  auto profitabilityCb = [=](const Inliner::ResolvedCall &call) {
-    return isProfitableToInline(call, inliningThreshold);
-  };
+  auto profitabilityCb =
+      [this, inliningThreshold](const Inliner::ResolvedCall &call) {
+        return isProfitableToInline(call, inliningThreshold);
+      };
 
   // Get an instance of the inliner.
   Inliner inliner(op, cg, *this, getAnalysisManager(), runPipelineHelper,