Remove redundant "enable_api" module from example

[sANGINI2004]

Context:
While exploring the codebase for better understanding, I noticed that the enable_api module was present in both the main.tf file of the examples folder and the modules folder. After confirming with abhiwa@, we concluded that this duplication is redundant.

Rationale:

1. The examples folder is intended to provide a working demonstration of the resources and code, serving as a practical reference for users.
2. Including enable_api in this context adds unnecessary complexity and goes against the purpose of examples.

Impact:

1. Improves clarity for users referring to the examples.
2. Aligns with best practices by maintaining separation of concerns between examples and modules.

Solution:
Removed the enable_api module from the main.tf in the examples folder.

[imrannayer]

@sANGINI2004 in example we are explicitly calling enable APIs cod enable_apis variable is passed as false in the module call. Module will not enable API. Normally we try to keep enable APIs etc outside of module since majority of the customers enable them as part of project factory.

terraform-google-memorystore/examples/redis-cluster/main.tf

Line 46 in ddb0ab8

enable_apis = false