Revert "Add Steve Johnson-style parser recovery rules:"

This reverts commit 97f8ee0d1b.

test/libsolidity/errorRecoveryTests/error_to_eos.sol

@@ -1,23 +0,0 @@
-// Example which where scanning hits EOS, so we reset.
-// Here we recover in the contractDefinition.
-// There should be an an AST created this contract (with errors).
-contract Error2 {
-  mapping (address => uint balances) // missing ;
-}
-
-// There is no error in this contract
-contract SendCoin {
-  function sendCoin(address receiver, uint amount) public returns(bool sufficient) {
-    if (balances[msg.sender] < amount) return false;
-    balances[msg.sender] -= amount;
-    balances[receiver] += amount;
-    emit Transfer(msg.sender, receiver, amount);
-    return true;
-  }
-}
-
-// ----
-// ParserError: (212-220): Expected ')' but got identifier
-// ParserError: (220-221): Expected ';' but got ')'
-// ParserError: (220-221): Function, variable, struct or modifier declaration expected.
-// Warning: (235-236): Recovered in ContractDefinition at '}'.