Remove code and config specific to module template (#14)

- The `index.ts` and `index.test.ts` files in `src/` exist in the module
  template as examples, but we don't need them here.
- Since we don't have any real tests in this repo at the moment, we need
  to tell Jest it's okay to run without tests and that coverage is 0%.
- The Examples section in the PR template is specific to the module
  template and shouldn't be in derivative repos.

Author: mcmire

.github/pull_request_template.md

@@ -9,11 +9,3 @@ Are there any issues or other links reviewers should consult to understand this
 * Fixes #12345
 * See: #67890
 -->
-
-## Examples
-
-<!--
-Are there any examples of this change being used in another repository?
-
-When considering changes to the MetaMask module template, it's strongly preferred that the change be experimented with in another repository first. This gives reviewers a better sense of how the change works, making it less likely the change will need to be reverted or adjusted later.
--->

jest.config.js

@@ -42,9 +42,9 @@ module.exports = {
   coverageThreshold: {
     global: {
       branches: 0,
-      functions: 12.5,
-      lines: 4.16,
-      statements: 4.16,
+      functions: 0,
+      lines: 0,
+      statements: 0,
     },
   },
 
@@ -96,6 +96,9 @@ module.exports = {
   // An enum that specifies notification mode. Requires { notify: true }
   // notifyMode: "failure-change",
 
+  // TODO: We don't have any tests right now, but we should add them.
+  passWithNoTests: true,
+
   // A preset that is used as a base for Jest's configuration
   preset: 'ts-jest',