Remove header metadata from update types script

[Charles-Gagnon]

DefinitelyTyped changed their format, so the generated typings file doesn't need to have this metadata anymore.

[coveralls]

Pull Request Test Coverage Report for Build 6803208096

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 11 unchanged lines in 4 files lost coverage.
• Overall coverage decreased (-0.02%) to 41.559%

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Files with Coverage Reduction	New Missed Lines	%
extensions/notebook/src/book/bookTreeView.ts	1	36.91%
extensions/sql-database-projects/src/common/httpClient.ts	1	66.18%
extensions/sql-database-projects/src/dialogs/publishDatabaseDialog.ts	2	52.03%
extensions/notebook/src/dialog/configurePython/configurePythonWizard.ts	7	41.73%

Totals
Change from base Build 6803069306:	-0.02%
Covered Lines:	30777
Relevant Lines:	69355

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💛 - Coveralls