chore: remove redundant words (#3441)

Signed-off-by: fudancoder <fudancoder@icloud.com.>
Co-authored-by: fudancoder <fudancoder@icloud.com.>

ts/packages/spl-governance/idl.json

@@ -2947,7 +2947,7 @@
     {
       "code": 584,
       "name": "ProposalIsNotExecutable",
-      "msg": "Proposal is not not executable"
+      "msg": "Proposal is not executable"
     },
     {
       "code": 585,

ts/packages/spl-governance/program/lib.rs

@@ -1848,8 +1848,8 @@ pub enum GovernanceError {
     #[msg("Invalid proposal options")]
     InvalidProposalOptions,
 
-    /// Proposal is not not executable
-    #[msg("Proposal is not not executable")]
+    /// Proposal is not executable
+    #[msg("Proposal is not executable")]
     ProposalIsNotExecutable,
 
     /// Invalid vote

ts/packages/spl-governance/src/program.ts

@@ -2910,7 +2910,7 @@ type SplGovernance = {
     {
       code: 584;
       name: "ProposalIsNotExecutable";
-      msg: "Proposal is not not executable";
+      msg: "Proposal is not executable";
     },
     {
       code: 585;
@@ -5869,7 +5869,7 @@ const IDL: SplGovernance = {
     {
       code: 584,
       name: "ProposalIsNotExecutable",
-      msg: "Proposal is not not executable",
+      msg: "Proposal is not executable",
     },
     {
       code: 585,