fix: gatheringId 제거

Author: JunRain2

tuk-api/src/main/kotlin/nexters/tuk/application/proposal/dto/request/ProposalCommand.kt

@@ -5,7 +5,6 @@ import nexters.tuk.application.proposal.vo.ProposalPurposeInfo
 class ProposalCommand {
     data class Propose(
         val memberId: Long,
-        val gatheringId: Long?,
         val purpose: ProposalPurposeInfo
     )
 }

tuk-api/src/main/kotlin/nexters/tuk/ui/proposal/ProposalDto.kt

@@ -6,13 +6,11 @@ import nexters.tuk.application.proposal.vo.ProposalPurposeInfo
 class ProposalDto {
     class Request {
         data class Publish(
-            val gatheringId: Long?,
             val purpose: ProposalPurposeInfo,
         ) {
             fun toCommand(memberId: Long): ProposalCommand.Propose {
                 return ProposalCommand.Propose(
                     memberId = memberId,
-                    gatheringId = gatheringId,
                     purpose = purpose
                 )
             }