delete the min_issue part

Author: zhuoran-Cheng16

integrations/acquisition/covidcast/test_covidcast_meta_caching.py

@@ -109,13 +109,14 @@ def test_caching(self):
         'max_time': 20200422,
         'num_locations': 2,
         'last_update': 789,
-        'min_value': 1.0,
-        'max_value': 1.0,
-        'mean_value': 1.0,
-        'stdev_value': 0.0,
+        'min_value': 1,
+        'max_value': 1,
+        'mean_value': 1,
+        'stdev_value': 0,
         'max_issue': 20200423,
         'min_lag': 0,
         'max_lag': 1,
+        
       }
     ])
     epidata1={'result':1, 'message':'success', 'epidata':epidata1}

src/acquisition/covidcast/database.py

@@ -299,17 +299,7 @@ def compute_covidcast_meta(self, table_name='covidcast', use_index=True):
         `time_type` ASC,
         `geo_type` ASC 
       '''
-    min_sql = f'''
-      SELECT
-        `time_type`,
-        MIN(`issue`) as `min_issue`
-      FROM 
-        `{table_name}`
-      ORDER BY
-        `time_type` ASC
-      '''
-
-
+      
     meta = []
     meta_lock = threading.Lock()