Remove Netlify CMS (2/2) (#711)

This moves files from `www/src/cms` to `www/src/pages`.

It also runs the files through Prettier.

.prettierignore

@@ -7,8 +7,6 @@ www/public
 www/.cache
 # Prevent Yarn and Prettier from conflicting.
 package.json
-# Ignore the Netlify CMS files because those are edited through a WYSIWYG interface.
-www/src/cms/**/*.md
 
 coverage
 yarn.lock

www/gatsby-config.js

@@ -40,13 +40,6 @@ module.exports = {
                 path: `${__dirname}/src/pages`,
             },
         },
-        {
-            resolve: 'gatsby-source-filesystem',
-            options: {
-                name: 'cms',
-                path: `${__dirname}/src/cms`,
-            },
-        },
         {
             resolve: 'gatsby-plugin-sass',
             options: {

www/gatsby-node.js

@@ -58,72 +58,3 @@ exports.onCreateWebpackConfig = ({ actions }) => {
         },
     });
 };
-
-/**
- * Create pages from the Markdown files created by Netlify CMS.
- *
- */
-exports.createPages = async ({ graphql, actions, reporter }) => {
-    const { createPage } = actions;
-
-    const result = await graphql(`
-        query {
-            allFile(filter: { sourceInstanceName: { eq: "cms" }, ext: { eq: ".md" } }) {
-                edges {
-                    node {
-                        name
-                        relativeDirectory
-                        relativePath
-                        childMdx {
-                            id
-                            frontmatter {
-                                title
-                                description
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    `);
-
-    if (result.errors) {
-        reporter.panicOnBuild("Can't load MDX files used by Netlify CMS.");
-    }
-
-    result.data.allFile.edges.forEach(({ node }) => {
-        let slug;
-
-        // These are all the collections that we previously used in Netlify CMS. This will be
-        // removed once we remove the CMS.
-        if (node.relativeDirectory === 'overview') {
-            slug = `/overview/${node.name}/`;
-        } else if (node.relativeDirectory === 'guide') {
-            slug = `/guide/product/${node.name}/`;
-        } else if (node.relativeDirectory === 'components-ios') {
-            slug = `/components/${node.name}/ios/`;
-        } else if (node.relativeDirectory === 'components-android') {
-            slug = `/components/${node.name}/android/`;
-        } else if (node.relativeDirectory === 'components-usage') {
-            slug = `/components/${node.name}/usage/`;
-        } else {
-            reporter.panicOnBuild(
-                `Can't generate a URL for the Markdown file in \`${node.relativePath}\`. Take a look at \`createPages\` in \`gatsby-node.js\`.`,
-            );
-        }
-
-        createPage({
-            path: slug,
-            component: path.resolve(`./src/components/cms/index.jsx`),
-            context: {
-                id: node.childMdx.id,
-                relatedComponentsGlob: `/components/${node.name}/*/`,
-                isComponent: slug.startsWith('/components/'),
-                frontmatter: {
-                    title: node.childMdx.frontmatter.title,
-                    description: node.childMdx.frontmatter.description,
-                },
-            },
-        });
-    });
-};