[Expression Propagation] remove propagation limit

[mari-mari]

Proposal

We have decided to propagate expressions so far it is possible. Afterwards, subsequent stages should control resulting expression length. Hence, we don't need propagation limits in the user config.

Approach

• Remove all configuration options for expression-propagation, expression-propagation-memory and expression-propagation-function-call from util/default.json.
• Remove the rule that controls expression length (_resulting_instruction_is_too_long(self, target, definition){...}) from ExpressionPropagationBase.
• Remove calls to _resulting_instruction_is_too_long from ExpressionPropagation, ExpressionPropagationMemory, ExpressionPropagationFunctionCall.