Remove unnecessary calculation

lib/rules_block/blockquote.js

@@ -40,8 +40,8 @@ module.exports = function blockquote(state, startLine, endLine, silent) {
   // so no point trying to find the end of it in silent mode
   if (silent) { return true; }
 
-  // skip spaces after ">" and re-calculate offset
-  initial = offset = state.sCount[startLine] + pos - (state.bMarks[startLine] + state.tShift[startLine]);
+  // set offset past spaces and ">"
+  initial = offset = state.sCount[startLine] + 1;
 
   // skip one optional space after '>'
   if (state.src.charCodeAt(pos) === 0x20 /* space */) {
@@ -147,8 +147,8 @@ module.exports = function blockquote(state, startLine, endLine, silent) {
     if (state.src.charCodeAt(pos++) === 0x3E/* > */ && !isOutdented) {
       // This line is inside the blockquote.
 
-      // skip spaces after ">" and re-calculate offset
-      initial = offset = state.sCount[nextLine] + pos - (state.bMarks[nextLine] + state.tShift[nextLine]);
+      // set offset past spaces and ">"
+      initial = offset = state.sCount[nextLine] + 1;
 
       // skip one optional space after '>'
       if (state.src.charCodeAt(pos) === 0x20 /* space */) {