fix Cloud SQL MySQL & PostgreSQL READMEs to remove unneecessary instructions

Author: Saketram Durbha

cloud-sql/mysql/sqlalchemy/README.md

@@ -17,17 +17,6 @@ name.
 [instructions](https://cloud.google.com/sql/docs/mysql/connect-external-app#4_if_required_by_your_authentication_method_create_a_service_account).
 Download a JSON key to use to authenticate your connection. 
 
-1. Use the information noted in the previous steps:
-```bash
-export GOOGLE_APPLICATION_CREDENTIALS=/path/to/service/account/key.json
-export CLOUD_SQL_CONNECTION_NAME='<MY-PROJECT>:<INSTANCE-REGION>:<INSTANCE-NAME>'
-export DB_USER='my-db-user'
-export DB_PASS='my-db-pass'
-export DB_NAME='my_db'
-```
-Note: Saving credentials in environment variables is convenient, but not secure - consider a more
-secure solution such as [Cloud KMS](https://cloud.google.com/kms/) to help keep secrets safe.
-
 ## Running locally
 
 To run this application locally, download and install the `cloud_sql_proxy` by
@@ -52,6 +41,8 @@ export DB_USER='<DB_USER_NAME>'
 export DB_PASS='<DB_PASSWORD>'
 export DB_NAME='<DB_NAME>'
 ```
+Note: Saving credentials in environment variables is convenient, but not secure - consider a more
+secure solution such as [Cloud KMS](https://cloud.google.com/kms/) to help keep secrets safe.
 
 Then use this command to launch the proxy in the background:
 ```bash
@@ -67,6 +58,8 @@ $env:DB_USER="<DB_USER_NAME>"
 $env:DB_PASS="<DB_PASSWORD>"
 $env:DB_NAME="<DB_NAME>"
 ```
+Note: Saving credentials in environment variables is convenient, but not secure - consider a more
+secure solution such as [Cloud KMS](https://cloud.google.com/kms/) to help keep secrets safe.
 
 Then use this command to launch the proxy in a separate PowerShell session:
 ```powershell
@@ -98,6 +91,8 @@ export DB_USER='<DB_USER_NAME>'
 export DB_PASS='<DB_PASSWORD>'
 export DB_NAME='<DB_NAME>'
 ```
+Note: Saving credentials in environment variables is convenient, but not secure - consider a more
+secure solution such as [Cloud KMS](https://cloud.google.com/kms/) to help keep secrets safe.
 
 Then use this command to launch the proxy in the background:
 ```bash

cloud-sql/postgres/sqlalchemy/README.md

@@ -17,17 +17,6 @@ name.
 [instructions](https://cloud.google.com/sql/docs/postgres/connect-external-app#4_if_required_by_your_authentication_method_create_a_service_account).
 Download a JSON key to use to authenticate your connection. 
 
-1. Use the information noted in the previous steps:
-```bash
-export GOOGLE_APPLICATION_CREDENTIALS=/path/to/service/account/key.json
-export CLOUD_SQL_CONNECTION_NAME='<MY-PROJECT>:<INSTANCE-REGION>:<INSTANCE-NAME>'
-export DB_USER='my-db-user'
-export DB_PASS='my-db-pass'
-export DB_NAME='my_db'
-```
-Note: Saving credentials in environment variables is convenient, but not secure - consider a more
-secure solution such as [Cloud KMS](https://cloud.google.com/kms/) to help keep secrets safe.
-
 ## Running locally
 
 To run this application locally, download and install the `cloud_sql_proxy` by
@@ -51,6 +40,8 @@ export DB_USER='<DB_USER_NAME>'
 export DB_PASS='<DB_PASSWORD>'
 export DB_NAME='<DB_NAME>'
 ```
+Note: Saving credentials in environment variables is convenient, but not secure - consider a more
+secure solution such as [Cloud KMS](https://cloud.google.com/kms/) to help keep secrets safe.
 
 Then use this command to launch the proxy in the background:
 ```bash
@@ -66,6 +57,8 @@ $env:DB_USER="<DB_USER_NAME>"
 $env:DB_PASS="<DB_PASSWORD>"
 $env:DB_NAME="<DB_NAME>"
 ```
+Note: Saving credentials in environment variables is convenient, but not secure - consider a more
+secure solution such as [Cloud KMS](https://cloud.google.com/kms/) to help keep secrets safe.
 
 Then use this command to launch the proxy in a separate PowerShell session:
 ```powershell
@@ -96,6 +89,8 @@ export DB_USER='<DB_USER_NAME>'
 export DB_PASS='<DB_PASSWORD>'
 export DB_NAME='<DB_NAME>'
 ```
+Note: Saving credentials in environment variables is convenient, but not secure - consider a more
+secure solution such as [Cloud KMS](https://cloud.google.com/kms/) to help keep secrets safe.
 
 Then use this command to launch the proxy in the background:
 ```bash