Removes hard coded provider versions in submodules

Not entirely sure of the impact here, Fred and I worked on it
together and think it'll do the right thing.

Not sure if this needs to be tagged as a specific release or not?

submodules/dns/private_A_record/provider-submodule.tf

@@ -2,7 +2,7 @@ terraform {
   required_providers {
     aws = {
       source = "hashicorp/aws"
-      version = "= 3.37.0"
+      #version = "= 3.37.0"
       configuration_aliases = [ aws.c2 ]
     }
   }

submodules/dns/private_CNAME_record/provider-submodule.tf

@@ -2,7 +2,7 @@ terraform {
   required_providers {
     aws = {
       source = "hashicorp/aws"
-      version = "= 3.37.0"
+      #version = "= 3.37.0"
       configuration_aliases = [ aws.c2 ]
     }
   }

submodules/dns/public_ALIAS_record/provider-submodule.tf

@@ -2,7 +2,7 @@ terraform {
   required_providers {
     aws = {
       source = "hashicorp/aws"
-      version = "= 3.37.0"
+      #version = "= 3.37.0"
       configuration_aliases = [ aws.mdr-common-services-commercial ]
     }
   }

submodules/dns/public_A_record/provider-submodule.tf

@@ -2,7 +2,7 @@ terraform {
   required_providers {
     aws = {
       source = "hashicorp/aws"
-      version = "= 3.37.0"
+      #version = "= 3.37.0"
       configuration_aliases = [ aws.mdr-common-services-commercial ]
     }
   }