Remove stage name column (#31)

As decided by consensus on day 2 of the 84th meeting of the committee 14 July 2021 @ 13:30 JST

index.html

@@ -38,7 +38,6 @@ <h2>Stages</h2>
   <caption>ECMAScript Proposal Stages</caption>
   <thead>
     <tr>
-      <th>
       <th>Stage
       <th>Purpose
       <th>Entrance Criteria
@@ -50,7 +49,6 @@ <h2>Stages</h2>
   </thead>
   <tr>
     <td>0
-    <td>Strawperson
     <td>Allow input into the specification
     <td>None
     <td>N/A
@@ -60,7 +58,6 @@ <h2>Stages</h2>
   </tr>
   <tr>
     <td>1
-    <td>Proposal
     <td>
       <ul>
         <li>Make the case for the addition
@@ -87,7 +84,6 @@ <h2>Stages</h2>
   </tr>
   <tr>
     <td>2
-    <td>Draft
     <td>Precisely describe the syntax and semantics using formal spec language
     <td>
       <ul>
@@ -102,7 +98,6 @@ <h2>Stages</h2>
   </tr>
   <tr>
     <td>3
-    <td>Candidate
     <td>Indicate that further refinement will require feedback from implementations and users
     <td>
       <ul>
@@ -119,7 +114,6 @@ <h2>Stages</h2>
   </tr>
   <tr>
     <td>4
-    <td>Finished
     <td>Indicate that the addition is ready for inclusion in the formal ECMAScript standard
     <td>
       <ul>