test(Errors): remove stacktrace from snapshot

Author: michael-ciniawsky

test/Errors.test.js

@@ -23,9 +23,9 @@ describe('Errors', () => {
         error()
       } catch (err) {
         const message = err.message
-          .split('\n')
-          .slice(1)
-          .join('\n')
+          .split('\n\n')
+          .slice(1, -1)
+          .join('\n\n')
 
         expect(message).toMatchSnapshot()
       }

test/__snapshots__/Errors.test.js.snap

@@ -11,11 +11,4 @@ exports[`Errors Syntax Error 1`] = `
 "
 `;
 
-exports[`Errors Validation Error 1`] = `
-"ValidationError: PostCSS Loader Invalid Options
-
-options.sourceMap should be {String|Boolean} (https://github.com/postcss/postcss-loader#sourcemap)
-
-    at validateOptions (/Users/Cini/Github/webpack/loaders/postcss/node_modules/@webpack-utilities/schema/src/validateOptions.js:25:11)
-    at Object.loader (/Users/Cini/Github/webpack/loaders/postcss/src/index.js:44:3)"
-`;
+exports[`Errors Validation Error 1`] = `"options.sourceMap should be {String|Boolean} (https://github.com/postcss/postcss-loader#sourcemap)"`;