Remove superfluous returncode check

Given that the commands are called with `check: true`, meson will
immediately exit with an error if these commands exit non-zero.

See: #193

meson.build

@@ -28,13 +28,11 @@ git = find_program('git', native: true, required: false)
 if fs.is_dir('.git') and git.found()
 	git_commit = run_command([git, 'rev-parse', '--short', 'HEAD'], check: true)
 	git_branch = run_command([git, 'rev-parse', '--abbrev-ref', 'HEAD'], check: true)
-	if git_commit.returncode() == 0 and git_branch.returncode() == 0
-		version = '"@0@-@1@ (" __DATE__ ", branch \'@2@\')"'.format(
-			meson.project_version(),
-			git_commit.stdout().strip(),
-			git_branch.stdout().strip(),
-		)
-	endif
+	version = '"@0@-@1@ (" __DATE__ ", branch \'@2@\')"'.format(
+		meson.project_version(),
+		git_commit.stdout().strip(),
+		git_branch.stdout().strip(),
+	)
 endif
 
 add_project_arguments('-DWFRECORDER_VERSION=@0@'.format(version), language: 'cpp')