Remove deprecated code [#3103335]

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  Line   modules/salesforce_mapping/salesforce_mapping.install                     
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  25     Call to deprecated function db_query():                                   
         in drupal:8.0.0 and is removed from drupal:9.0.0. Instead,                
         get a database connection injected into your service from the container   
         and call query() on it. For example,                                      
  35     Call to deprecated function db_query():                                   
         in drupal:8.0.0 and is removed from drupal:9.0.0. Instead,                
         get a database connection injected into your service from the container   
         and call query() on it. For example,                                      
  66     Call to deprecated function db_drop_index():                              
         in drupal:8.0.0 and is removed from drupal:9.0.0. Instead,                
         get a database connection injected into your service from the container,  
         get its schema driver, and call dropIndex() on it. For example,           
  71     Call to deprecated function db_drop_field():                              
         in drupal:8.0.0 and is removed from drupal:9.0.0. Instead,                
         get a database connection injected into your service from the container,  
         get its schema driver, and call dropField() on it. For example,           
  72     Call to deprecated function db_drop_field():                              
         in drupal:8.0.0 and is removed from drupal:9.0.0. Instead,                
         get a database connection injected into your service from the container,  
         get its schema driver, and call dropField() on it. For example,           
  73     Call to deprecated function db_drop_field():                              
         in drupal:8.0.0 and is removed from drupal:9.0.0. Instead,                
         get a database connection injected into your service from the container,  
         get its schema driver, and call dropField() on it. For example,           
  74     Call to deprecated function db_drop_field():                              
         in drupal:8.0.0 and is removed from drupal:9.0.0. Instead,                
         get a database connection injected into your service from the container,  
         get its schema driver, and call dropField() on it. For example,           
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  Line   modules/salesforce_pull/salesforce_pull.install                          
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  45     Call to deprecated function db_query():                                  
         in drupal:8.0.0 and is removed from drupal:9.0.0. Instead,               
         get a database connection injected into your service from the container  
         and call query() on it. For example,                                     
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