fix: 移除项目列表中的参赛人数限制列

- 从competition/index.vue移除参赛人数限制列
- 从competition/create.vue移除参赛人数限制列
- 该功能已不再使用

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

src/views/martial/competition/create.vue

@@ -361,23 +361,6 @@
             </template>
           </el-table-column>
 
-          <el-table-column
-            label="参赛人数限制"
-            width="130"
-            align="center"
-          >
-            <template #default="scope">
-              <el-input-number
-                v-if="mode !== 'view'"
-                v-model="scope.row.maxParticipants"
-                :min="1"
-                :max="9999"
-                size="small"
-                style="width: 100%"
-              />
-              <span v-else>{{ scope.row.maxParticipants || '不限' }}</span>
-            </template>
-          </el-table-column>
 
           <el-table-column
             label="项目说明"

src/views/martial/competition/index.vue

@@ -709,23 +709,6 @@
                 </template>
               </el-table-column>
 
-              <el-table-column
-                label="参赛人数限制"
-                width="130"
-                align="center"
-              >
-                <template #default="scope">
-                  <el-input-number
-                    v-if="currentView !== 'view'"
-                    v-model="scope.row.maxParticipants"
-                    :min="1"
-                    :max="9999"
-                    size="small"
-                    style="width: 100%"
-                  />
-                  <span v-else>{{ scope.row.maxParticipants || '不限' }}</span>
-                </template>
-              </el-table-column>
 
               <el-table-column
                 label="报名费用(元)"