Bug: wrong "Fields" type info while using memberpage

**Operating System**: (`Windows` or `Linux` or `MacOS`)

Win 10

**DocFX Version Used**:

docfx 2.56.6.0

**Template used**: (`default` or `statictoc` or contain custom template)

"template": [
"statictoc",
"Plugins/memberpage.2.56.6/content"
],

**Steps to Reproduce**:

1. writing a cs script with fields
2. docfx --server
3.

**Expected Behavior**:

The Field page should have "declaration", ''Field Value" content, and do not contains "Namespace" ,"Assembly:"

like the Fields type displayed while using default template


**Actual Behavior**:

declaration -> Syntax
Field Value -> returns

"Namespace", "Assembly" that should not be displayed