Removing a bunch of redundant casts

Author: StanleyGoldman

src/GitHub.Api/Installer/GitInstaller.cs

@@ -96,7 +96,7 @@ public bool IsGitLfsExtracted()
                 return false;
             }
 
-            var calculateMd5 = (string)environment.FileSystem.CalculateFileMD5((string)GitLfsExecutablePath);
+            var calculateMd5 = environment.FileSystem.CalculateFileMD5(GitLfsExecutablePath);
             logger.Trace("GitLFS MD5: {0}", calculateMd5);
             var md5 = environment.IsWindows ? WindowsGitLfsExecutableMD5 : MacGitLfsExecutableMD5;
             if (String.Compare(calculateMd5, md5, true) != 0)

src/tests/IntegrationTests/Git/GitSetupTests.cs

@@ -41,7 +41,7 @@ public async Task InstallGit()
                 gitLfsDestinationPath = gitLfsDestinationPath.Combine("libexec", "git-core", "git-lfs.exe");
                 gitLfsDestinationPath.FileExists().Should().BeTrue();
 
-                var calculateMd5 = (string)NPath.FileSystem.CalculateFileMD5((string)gitLfsDestinationPath);
+                var calculateMd5 = NPath.FileSystem.CalculateFileMD5(gitLfsDestinationPath);
                 Assert.IsTrue(string.Compare(calculateMd5, GitInstaller.WindowsGitLfsExecutableMD5, true) == 0);
 
                 setupDone = await gitSetup.SetupIfNeeded(new Progress<float>(x => percent = x));
@@ -83,7 +83,7 @@ public void VerifyWindowsGitLfsBundle()
 
             gitLfsPath.Exists().Should().BeTrue();
 
-            var calculateMd5 = (string)NPath.FileSystem.CalculateFileMD5((string)gitLfsPath);
+            var calculateMd5 = NPath.FileSystem.CalculateFileMD5(gitLfsPath);
             calculateMd5.ToLower().Should().Be(GitInstaller.WindowsGitLfsExecutableMD5.ToLower());
         }
 
@@ -103,7 +103,7 @@ public void VerifyMacGitLfsBundle()
 
             gitLfsPath.Exists().Should().BeTrue();
 
-            var calculateMd5 = (string)NPath.FileSystem.CalculateFileMD5((string)gitLfsPath);
+            var calculateMd5 = NPath.FileSystem.CalculateFileMD5(gitLfsPath);
             calculateMd5.ToLower().Should().Be(GitInstaller.MacGitLfsExecutableMD5.ToLower());
         }
     }