[gardening] Use the idiomatic convention of naming unused variables "_"

Author: practicalswift

utils/sil-opt-verify-all-modules.py

@@ -150,7 +150,7 @@ def main():
         # Find Xcode.
         swift_path = subprocess.check_output([ 'xcrun', '--find', 'swift' ])
         xcode_path = swift_path
-        for i in range(0, 7):
+        for _ in range(0, 7):
             xcode_path = os.path.dirname(xcode_path)
 
         toolchains_dir = os.path.join(

utils/swift-bench.py

@@ -62,7 +62,7 @@ class SwiftBenchHarness:
 
   def log(self, str, level):
     if self.verboseLevel >= level:
-      for i in range(1,level):
+      for _ in range(1, level):
         sys.stdout.write('  ')
       print(str)
 
@@ -300,7 +300,7 @@ def runBench(self, name):
       return
     samples = []
     self.log("Running bench: %s, numsamples: %d" % (name, numSamples), 2)
-    for i in range(0,numSamples):
+    for _ in range(0, numSamples):
       try:
         r = self.runCommand([self.tests[name].binary, str(iterScale),
                              self.tests[name].name])