Remove unhandled exception handling blocks.

[Aadesh-Baral]

Part of #5912
As all of the unhandled errors will be now captured and processed by flask errorhandler defined on #5909, we no longer have to handle them manually using try except blocks. This PR removes these blocks that were set to handle these unhandled exceptions.

tasking-manager/backend/__init__.py

Lines 116 to 147 in 9582691

	@app.errorhandler(Exception)
	def handle_generic_error(error):
	"""Generic error handler for all exceptions"""
	from backend.exceptions import format_sub_code
	app.logger.exception(error)
	error_message = (
	str(error)
	if len(str(error)) > 0
	else ERROR_MESSAGES["INTERNAL_SERVER_ERROR"]
	)
	error_code = error.code if hasattr(error, "code") else 500
	error_sub_code = (
	format_sub_code(error.name)
	if hasattr(error, "name")
	else "INTERNAL_SERVER_ERROR"
	)
	return (
	{
	"error": {
	"code": error_code,
	"sub_code": error_sub_code,
	"message": error_message,
	"details": {
	"url": request.url,
	"method": request.method,
	},
	}
	},
	error_code,
	)

[sonarqubecloud]

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[d-rita]

Tested endpoints via the swagger docs. Endpoints work fine. Odd cases that stood out were not related to this implementation. LGTM.