feat: Refactor instructions and fields in pr_code_suggestions_prompts.toml

pr_agent/settings/pr_code_suggestions_prompts.toml

@@ -37,9 +37,6 @@ Specific instructions:
 - Avoid making suggestions that have already been implemented in the PR code. For example, if you want to add logs, or change a variable to const, or anything else, make sure it isn't already in the '__new hunk__' code.
 - Provide the exact line numbers range (inclusive) for each suggestion.
 - When quoting variables or names from the code, use backticks (`) instead of single quote (').
-{%- if summarize_mode %}
-- If needed, use abbreviations for the 'existing code' and 'improved code' snippets, to keep the output short.
-{%- endif %}
 
 
 {%- if extra_instructions %}