chore: remove unnecessary third party proto files (celestiaorg#1545)

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## Overview

Closes celestiaorg#1543

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- [ ] New and updated code has appropriate documentation
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buf.lock

@@ -0,0 +1,15 @@
+# Generated by buf. DO NOT EDIT.
+version: v1
+deps:
+  - remote: buf.build
+    owner: cosmos
+    repository: cosmos-proto
+    commit: 1935555c206d4afb9e94615dfd0fad31
+  - remote: buf.build
+    owner: cosmos
+    repository: gogo-proto
+    commit: 34d970b699f84aa382f3c29773a60836
+  - remote: buf.build
+    owner: googleapis
+    repository: googleapis
+    commit: 463926e7ee924d46ad0a726e1cf4eacd

buf.yaml

@@ -1,5 +1,10 @@
 version: v1beta1
 
+name: buf.build/celestiaorg/celestia-app
+deps:
+  - buf.build/cosmos/cosmos-proto
+  - buf.build/cosmos/gogo-proto
+  - buf.build/googleapis/googleapis
 build:
   roots:
     - proto

proto/buf.gen.gogo.yaml

@@ -2,7 +2,7 @@ version: v1
 plugins:
   - name: gocosmos
     out: ..
-    opt: plugins=interfacetype+grpc,Mgoogle/protobuf/any.proto=github.com/celestiaorg/celestia-app/codec/types # yamllint disable-line rule:line-length
+    opt: plugins=grpc,Mgoogle/protobuf/any.proto=github.com/celestiaorg/celestia-app/codec/types # yamllint disable-line rule:line-length
   - name: grpc-gateway
     out: ..
     opt: logtostderr=true,allow_colon_final_segments=true

proto/celestia/blob/v1/event.proto

@@ -1,8 +1,6 @@
 syntax = "proto3";
 package celestia.blob.v1;
 
-import "gogoproto/gogo.proto";
-
 option go_package = "github.com/celestiaorg/celestia-app/x/blob/types";
 
 // EventPayForBlobs defines an event that is emitted after a pay for blob has

proto/celestia/blob/v1/tx.proto

@@ -1,7 +1,6 @@
 syntax = "proto3";
 package celestia.blob.v1;
 
-import "gogoproto/gogo.proto";
 import "google/api/annotations.proto";
 
 option go_package = "github.com/celestiaorg/celestia-app/x/blob/types";