Remove the version requirement and fix the apt_key var.

playbooks/roles/datadog-uninstall/defaults/main.yml

-datadog_uninstall_agent_version: '1:5.10.1-1'
 datadog_uninstall_apt_key: "0x382E94DE"
 DATADOG_UNINSTALL_UBUNTU_APT_KEYSERVER: "http://keyserver.ubuntu.com/pks/lookup?op=get&fingerprint=on&search="

playbooks/roles/datadog-uninstall/tasks/main.yml

@@ -2,7 +2,7 @@
 - name: Remove apt key for datadog
   apt_key:
     id: "382E94DE"
-    url: "{{ DATADOG_UNINSTALL_UBUNTU_APT_KEYSERVER }}{{ common_datadog_apt_key }}"
+    url: "{{ DATADOG_UNINSTALL_UBUNTU_APT_KEYSERVER }}{{ datadog_uninstall_apt_key }}"
     state: absent
 
 - name: Uninstall apt repository for datadog
@@ -13,5 +13,5 @@
 
 - name: Uninstall datadog agent
   apt:
-    name: "datadog-agent={{ common_datadog_agent_version }}"
+    name: "datadog-agent"
     state: absent