remove last updated field on docs pages (#25399)

Author: tesseralis

www/gatsby-config.js

@@ -91,12 +91,6 @@ module.exports = {
         },
       },
     },
-    {
-      resolve: `gatsby-transformer-gitinfo`,
-      options: {
-        include: /mdx?$/i,
-      },
-    },
     {
       resolve: `gatsby-source-npm-package-search`,
       options: {

www/package.json

@@ -65,7 +65,6 @@
     "gatsby-source-npm-package-search": "^2.3.8",
     "gatsby-transformer-csv": "^2.3.6",
     "gatsby-transformer-documentationjs": "^4.3.8",
-    "gatsby-transformer-gitinfo": "^1.1.0",
     "gatsby-transformer-remark": "^2.8.20",
     "gatsby-transformer-screenshot": "^2.3.12",
     "gatsby-transformer-sharp": "^2.5.7",

www/src/components/markdown-page-footer.js

@@ -12,26 +12,17 @@ export default function MarkdownPageFooter(props) {
           sx={{
             display: `flex`,
             alignItems: `center`,
-            justifyContent: `space-between`,
             mt: 9,
           }}
         >
           <a
             sx={{ variant: `links.muted` }}
-            href={`https://github.com/gatsbyjs/gatsby/blob/master/${
-              props.packagePage ? `packages` : `docs`
-            }/${props.page ? props.page.parent.relativePath : ``}`}
+            href={`https://github.com/gatsbyjs/gatsby/blob/master/docs/${
+              props.page ? props.page.parent.relativePath : ``
+            }`}
           >
             <EditIcon sx={{ mr: 2 }} /> Edit this page on GitHub
           </a>
-          {props.page?.parent?.fields?.gitLogLatestDate && (
-            <span sx={{ color: `textMuted`, fontSize: 1 }}>
-              Last updated:{` `}
-              <time dateTime={props.page.parent.fields.gitLogLatestDate}>
-                {props.page.parent.fields.gitLogLatestDate}
-              </time>
-            </span>
-          )}
         </div>
       )}
     </Fragment>
@@ -43,19 +34,6 @@ export const fragment = graphql`
     parent {
       ... on File {
         relativePath
-        fields {
-          gitLogLatestDate(formatString: "MMMM D, YYYY")
-        }
-      }
-    }
-  }
-  fragment MarkdownPageFooter on MarkdownRemark {
-    parent {
-      ... on File {
-        relativePath
-        fields {
-          gitLogLatestDate(formatString: "MMMM D, YYYY")
-        }
       }
     }
   }

www/src/utils/node/docs.js

@@ -61,18 +61,6 @@ exports.createSchemaCustomization = ({ actions: { createTypes } }) => {
       locale: String
     }
 
-    type File implements Node {
-      fields: FileFields
-    }
-
-    # Added by gatsby-transformer-gitinfo
-    # TODO add these back upstream
-    type FileFields {
-      gitLogLatestDate: Date @dateformat
-      gitLogLatestAuthorName: String
-      gitLogLatestAuthorEmail: String
-    }
-
     type GatsbyAPICall implements Node @derivedTypes @dontInfer {
       name: String
       file: String