Remove workaround for markdown-it-texmath issue fixed in @1.0.0.

Author: DavidAnson

demo/markdownlint-browser.js

@@ -1418,11 +1418,6 @@ function annotateAndFreezeTokens(tokens, lines) {
         if (!token.map && trMap) {
             token.map = [...trMap];
         }
-        // Adjust maps for math blocks
-        if (helpers.isMathBlock(token) && token.map[1]) {
-            // markdown-it-texmath plugin does not account for math_block_end
-            token.map[1]++;
-        }
         // Update token metadata
         if (token.map) {
             token.line = lines[token.map[0]];

lib/markdownlint.js

@@ -233,11 +233,6 @@ function annotateAndFreezeTokens(tokens, lines) {
     if (!token.map && trMap) {
       token.map = [ ...trMap ];
     }
-    // Adjust maps for math blocks
-    if (helpers.isMathBlock(token) && token.map[1]) {
-      // markdown-it-texmath plugin does not account for math_block_end
-      token.map[1]++;
-    }
     // Update token metadata
     if (token.map) {
       token.line = lines[token.map[0]];