fix(poc4): remove duplicate header wordmark

poc4_active_source_20260714/apps/poc4/mcp_discovery_ui.py

@@ -1968,7 +1968,6 @@ def _header_logo_url() -> str:
 
 
 def _render_kb_header() -> None:
-    logo_url = html.escape(_header_logo_url(), quote=True)
     st.markdown(
         f"""
         <section class="kb-hero">
@@ -1985,9 +1984,6 @@ def _render_kb_header() -> None:
               DEMO 화면입니다.
             </p>
           </div>
-          <div class="kb-ci-panel" aria-label="HMM 로고">
-            <img src="{logo_url}" alt="HMM 로고" />
-          </div>
         </section>
         """,
         unsafe_allow_html=True,