Fix home page overflowing by a few pixels

Because the height of our header component changed at some point, the hard-coded height values in the CSS were off by a few px and caused the page to overflow slightly.

src/home/common.module.css

@@ -16,7 +16,7 @@ limitations under the License.
 
 .container {
   display: flex;
-  min-height: calc(100% - 64px);
+  min-height: 100%;
   flex-direction: column;
   justify-content: space-between;
 }
@@ -42,8 +42,4 @@ limitations under the License.
   .logo {
     display: none;
   }
-
-  .container {
-    min-height: calc(100% - 76px);
-  }
 }