fix: remove git install assertion

It prevents some users to run the script on Windows.

Author: simonrenoult

src/io/index.ts

@@ -1,4 +1,3 @@
-import { execSync } from "node:child_process";
 import { existsSync } from "node:fs";
 
 import Cli from "./cli";
@@ -10,7 +9,6 @@ export default async function main(): Promise<void> {
   const options = await Cli.parse();
 
   warnIfUsingComplexityWithIncompatibleFileTypes(options);
-  assertGitIsInstalled();
   assertIsGitRootDirectory(options.directory);
 
   const statistics = await Statistics.compute(options);
@@ -26,14 +24,6 @@ function warnIfUsingComplexityWithIncompatibleFileTypes(options: Options) {
   }
 }
 
-function assertGitIsInstalled(): void {
-  try {
-    execSync("which git");
-  } catch (error) {
-    throw new Error("Program 'git' must be installed");
-  }
-}
-
 function assertIsGitRootDirectory(directory: string): void {
   if (!existsSync(`${directory}/.git`)) {
     throw new Error(`Argument 'dir' must be the git root directory.`);