fix: remove short policies command from readme

Author: cleissonbr

README.md

@@ -100,7 +100,7 @@ Cedar Agent configuration is available using environment variables and command l
   `--data`, `-d` command line argument.
 - Load policies from json file. Defaults to `None`.
   `POLICIES` environment variable.
-  `--policies`, `-p` command line argument.
+  `--policies` command line argument.
 
 **command line arguments take precedence over environment variables when configuring the Cedar Agent**
 

src/services/data/load_from_file.rs

@@ -89,4 +89,4 @@ impl Fairing for InitDataFairing {
             kind: Kind::Ignite
         }
     }
-}
+}

src/services/policies/load_from_file.rs

@@ -90,4 +90,4 @@ impl Fairing for InitPoliciesFairing {
             kind: Kind::Ignite
         }
     }
-}
+}