Remove Jason Grout's mastodon contact (#760)

Author: jasongrout

about.html

@@ -282,7 +282,6 @@
     photo: JasonGrout.jpeg
     affiliation: Databricks
     gh_handle: jasongrout
-    mastodon: https://fosstodon.org/@jasongrout
     personal: https://jasongrout.org/
   - name: Jessica Hamrick
     photo: JessicaHamrick.jpeg
@@ -341,7 +340,6 @@
     photo: JasonGrout.jpeg
     affiliation: Databricks
     gh_handle: jasongrout
-    mastodon: https://fosstodon.org/@jasongrout
     personal: https://jasongrout.org/
   - name: Fernando Pérez
     photo: FernandoPerez.jpeg
@@ -431,7 +429,6 @@
     photo: JasonGrout.jpeg
     affiliation: Databricks
     gh_handle: jasongrout
-    mastodon: https://fosstodon.org/@jasongrout
     personal: https://jasongrout.org/
   - name: Tim George
     photo: TimGeorge.jpeg
@@ -458,7 +455,6 @@
   photo: JasonGrout.jpeg
   affiliation: Databricks
   gh_handle: jasongrout
-  mastodon: https://fosstodon.org/@jasongrout
   personal: https://jasongrout.org/
 - name: Ana Ruvalcaba
   photo: Ana_Ruvalcaba.jpg