🎨 address @davidsuehring's code review

 - Remove OKTA_AWS_REGION as it is unused

Readme.MD

@@ -135,7 +135,6 @@ Here is the list of parameters that can be environment variables or settings in
  - ```OKTA_BROWSER_AUTH``` set to **true** to use integrated web browser for authentication (default: **false**)
  - ```OKTA_COOKIES_PATH``` is directory path to store cookies.properties for Okta. This is particularly useful when running this tool in many concurrent processes like you might with **OKTA_ENV_MODE** (default: ~/.okta)
  - ```OKTA_PROFILE``` is the name of the AWS profile to create/reuse. May also be specified on the commandline by ```--profile```. (default: get AWS profile name based on per-session STS user name) 
- - ```OKTA_AWS_REGION``` is the default AWS region to store with the created profile.
  - ```OKTA_AWS_ROLE_TO_ASSUME``` is the role to use. If present will try to match okta account's retrieved role list and use it. Will still prompt if no match found.
  - ```OKTA_STS_DURATION``` is the duration the role will be assumed, in seconds. The maximum session duration allowed by AWS is 12 hours and this needs to be set on the role as well. Defaults to 1hr.
  

src/main/java/com/okta/tools/OktaAwsCliEnvironment.java

@@ -15,18 +15,17 @@ public class OktaAwsCliEnvironment {
  public String awsRoleToAssume;
 
  public int stsDuration;
- public final String awsRegion;
  public final boolean oktaEnvMode;
 
  public OktaAwsCliEnvironment()
  {
- this(false, null, null, null, null, null, null, null, 0, null, false);
+ this(false, null, null, null, null, null, null, null, 0, false);
  }
 
  public OktaAwsCliEnvironment(boolean browserAuth, String oktaOrg,
  String oktaUsername, Supplier<String> oktaPassword, String oktaCookiesPath,
  String oktaProfile, String oktaAwsAppUrl, String awsRoleToAssume,
- int stsDuration, String awsRegion,
+ int stsDuration,
  boolean oktaEnvMode) {
  this.browserAuth = browserAuth;
  this.oktaOrg = oktaOrg;
@@ -37,7 +36,6 @@ public OktaAwsCliEnvironment(boolean browserAuth, String oktaOrg,
  this.oktaAwsAppUrl = oktaAwsAppUrl;
  this.awsRoleToAssume = awsRoleToAssume;
  this.stsDuration = stsDuration;
- this.awsRegion = awsRegion;
  this.oktaEnvMode = oktaEnvMode;
  }
 }

src/main/java/com/okta/tools/OktaAwsConfig.java

@@ -56,7 +56,6 @@ static OktaAwsCliEnvironment loadEnvironment(String profile) {
  getEnvOrConfig(properties, "OKTA_AWS_APP_URL"),
  getEnvOrConfig(properties, "OKTA_AWS_ROLE_TO_ASSUME"),
  getStsDurationOrDefault(getEnvOrConfig(properties, "OKTA_STS_DURATION")),
- getAwsRegionOrDefault(getEnvOrConfig(properties, "OKTA_AWS_REGION")),
  Boolean.parseBoolean(getEnvOrConfig(properties, "OKTA_ENV_MODE"))
  );
  }