fix: Remove duplicate quick start title from wrappers README (#1230)

Author: aandreassa

gapic-generator-cloud/templates/cloud/wrapper_gem/readme.text.erb

@@ -53,8 +53,6 @@ In order to use this library, you first need to go through the following steps:
 1. [Set up authentication.](AUTHENTICATION.md)
 
 <%- end -%>
-## Quick Start
-
 <%- if gem.packages? -%>
 ```ruby
 require "<%= gem.entrypoint_require %>"

shared/output/cloud/compute_small_wrapper/README.md

@@ -30,8 +30,6 @@ In order to use this library, you first need to go through the following steps:
 1. [Enable billing for your project.](https://cloud.google.com/billing/docs/how-to/modify-project#enable_billing_for_a_project)
 1. [Set up authentication.](AUTHENTICATION.md)
 
-## Quick Start
-
 ```ruby
 require "google/cloud/compute"
 

shared/output/cloud/language_wrapper/README.md

@@ -34,8 +34,6 @@ In order to use this library, you first need to go through the following steps:
 1. [Enable the API.](https://console.cloud.google.com/apis/library/language.googleapis.com)
 1. [Set up authentication.](AUTHENTICATION.md)
 
-## Quick Start
-
 ```ruby
 require "google/cloud/language"
 

shared/output/cloud/secretmanager_wrapper/README.md

@@ -35,8 +35,6 @@ In order to use this library, you first need to go through the following steps:
 1. [Enable the API.](https://console.cloud.google.com/apis/library/secretmanager.googleapis.com)
 1. [Set up authentication.](AUTHENTICATION.md)
 
-## Quick Start
-
 ```ruby
 require "google/cloud/secret_manager"