Revert "Added Jest snapshot test files as generated src (#3572)" (#3579)

This reverts commit f38d6bd124.

lib/linguist/generated.rb

@@ -81,8 +81,7 @@ module Linguist
       generated_grammarkit? ||
       generated_roxygen2? ||
       generated_jison? ||
-      generated_yarn_lock? ||
-      generated_jest_snapshot?
+      generated_yarn_lock?
     end
 
     # Internal: Is the blob an Xcode file?
@@ -490,15 +489,5 @@ module Linguist
       return false unless lines.count > 0
       return lines[0].include?("# THIS IS AN AUTOGENERATED FILE")
     end
-
-    # Internal: Is this a Jest [snapshot test](https://facebook.github.io/jest/docs/snapshot-testing.html)
-    # file?
-    #
-    # Return true or false.
-    def generated_jest_snapshot?
-      return false unless extname == '.snap'
-      return false unless lines.count > 0
-      return lines[0].start_with?("// Jest Snapshot")
-    end
   end
 end

test/fixtures/Data/Jest.js.snap

@@ -1,15 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`View renders correctly 1`] = `
-<View
-  style={
-    Object {
-      "alignItems": "center",
-      "flex": 1,
-      "margin": 40,
-      "paddingLeft": 10,
-      "paddingRight": 10,
-    }
-  }
-/>
-`;

test/test_generated.rb

@@ -79,12 +79,9 @@ class TestGenerated < Minitest::Test
     generated_fixture_loading_data("Data/sourcemap.v3.map")
     generated_fixture_loading_data("Data/sourcemap.v1.map")
 
-    # Yarn lockfile
+    # Yarn locfile
     generated_fixture_loading_data("Data/yarn.lock")
 
-    # Jest snapshot test
-    generated_fixture_loading_data("Data/Jest.js.snap")
-
     # Specflow
     generated_fixture_without_loading_data("Features/BindingCulture.feature.cs")