Update list of monthly report people

wiki/src/blueprint/monthly_report.mdwn

@@ -16,17 +16,6 @@ The month in the list corresponds to the month to be reported about. For
 example, the report about April in the list will be written at the
 beginning of May.
 
-  - January 2018: sajolida
-  - February 2018: u
-  - March 2018: intrigeri
-  - April 2018: emmapeel
-  - May 2018: spriver
-  - June 2018: sajolida
-  - July 2018: pablonatalino & emmapeel
-  - August 2018: intrigeri
-  - September 2018: sajolida
-  - October 2018: u
-  - November 2018: muri
   - December 2018: spriver
   - January 2019:
   - February 2019: intrigeri
@@ -41,20 +30,19 @@ beginning of May.
   - November 2019:
   - December 2019:
 
-### 2017
-
-  - January 2017: u
-  - February 2017:emmapeel
-  - March 2017: intrigeri
-  - April 2017: spriver
-  - May 2017: u
-  - June 2017: intrigeri
-  - July 2017: sajolida
-  - August 2017: spriver
-  - September 2017: emmapeel
-  - October 2017: sajolida
-  - November 2017:muri
-  - December 2017: muri
+### 2018
+
+  - January 2018: sajolida
+  - February 2018: u
+  - March 2018: intrigeri
+  - April 2018: emmapeel
+  - May 2018: spriver
+  - June 2018: sajolida
+  - July 2018: pablonatalino & emmapeel
+  - August 2018: intrigeri
+  - September 2018: sajolida
+  - October 2018: u
+  - November 2018: muri
 
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