Revert "[nrf fromlist] net: lib: tls_credentials_shell: Add a config for heap"

This reverts commit f3dc6eb.

Signed-off-by: Chaitanya Tata <[email protected]>
(cherry picked from commit dbb82e3)

Author: krish2718

subsys/net/lib/tls_credentials/Kconfig.shell

@@ -32,13 +32,4 @@ config TLS_CREDENTIALS_SHELL_DIGEST_BUF_SIZE
 
 	   Also used to print error messages if digest generation fails.
 
-if TLS_CREDENTIALS_BACKEND_VOLATILE
-config HEAP_MEM_POOL_ADD_SIZE_TLS_CRED_SHELL
-	int "TLS credentials shell memory pool size"
-	# default 4 certs and each assume 1500 bytes
-	default 6000
-	help
-	  The size of the memory pool used by the TLS credentials shell.
-endif # TLS_CREDENTIALS_BACKEND_VOLATILE
-
 endif # TLS_CREDENTIALS_SHELL