remove knowledge from global tools

Signed-off-by: Grant Linville <[email protected]>

Author: g-linville

tests/fixtures/global-tools.gpt

@@ -4,7 +4,7 @@ Runbook 3
 
 ---
 Name: tool_1
-Global Tools: github.com/gptscript-ai/knowledge, github.com/drpebcak/duckdb, github.com/gptscript-ai/browser, github.com/gptscript-ai/browser-search/google, github.com/gptscript-ai/browser-search/google-question-answerer
+Global Tools: github.com/drpebcak/duckdb, github.com/gptscript-ai/browser, github.com/gptscript-ai/browser-search/google, github.com/gptscript-ai/browser-search/google-question-answerer
 
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