Delete developer-attraction and technological-advancement model doc in the niche-creation dimension

Signed-off-by: lishengbao <[email protected]>

Author: lishengbao

metrics-models/niche-creation/README.md

@@ -13,10 +13,6 @@ Definition: The capacity to create and recognize meaningful diversity and thereb
 
 ## Metrics Models
 
-## [Developer Attraction](./ecological-diversity/developer-attraction.md#developer-attraction)
-
-Coming soon!
-
 ## [Organizations Activity](./ecological-diversity/organization-activity.md#organizations-activity)
 
 Metrics Name | Definition | Threshold | Weight
@@ -25,8 +21,3 @@ Metrics Name | Definition | Threshold | Weight
 [Org Contributor Count](./ecological-diversity/organization-activity.md#org-contributor-count) | Number of active code contributors with organization affiliation in the past 90 days. | 300 | 25.806%
 [Org Commit Frequency](./ecological-diversity/organization-activity.md#org-commit-frequency) | Determine the average number of commits with organization affiliation per week in the past 90 days. | 800 | 25.806%
 [Org Contribution Last](./ecological-diversity/organization-activity.md#org-contribution-last) | Total contribution time of all organizations to the community in the past 90 days (weeks). | 200 | 16.129%
-
-
-## [Technological Advancement](./technological-advancement.md#technological-advancement)
-
-Coming soon!