_reports: remove redundant report_year property

This commit removes the report_year property from the frontmatter
of each of the .md files in the _reports/ directory.

See also: #669

Author: angussidney

_reports/GuangyuanYang.md

@@ -7,7 +7,6 @@ date: 2018-08-14
 student: Guangyuan Yang
 organisation: coala
 organisation_link: https://coala.io
-report_year: 2018
 project: Go Bears on BSD
 project_link: https://summerofcode.withgoogle.com/projects/#4521151787696128
 tarball: https://github.com/yzgyyang/gsoc-reports/raw/master/gsoc18/GuangyuanYang-coala-gsoc18.tar.gz

_reports/NitanshuVashistha.md

@@ -7,7 +7,6 @@ date: 2018-08-12
 student: Nitanshu Vashistha
 organisation: coala
 organisation_link: https://coala.io
-report_year: 2018
 project: Corobo Enhancement - Security, Testing And Configurability
 project_link: https://summerofcode.withgoogle.com/projects/#6603667076022272
 tarball: https://rawgit.com/nvzard/GSoC-Report/master/project.tar.gz

_reports/RJ722.md

@@ -5,7 +5,6 @@ categories:
   - StatusReport
 permalink: /GSoC/2018/StatusReport/RahulJha
 date: 2018-08-12
-report_year: 2018
 title: Rahul Jha
 student: Rahul Jha
 organisation: coala

_reports/RaiVaibhav.md

@@ -3,7 +3,6 @@ categories:
   - GSoC
   - 2018
   - StatusReport
-report_year: 2018
 date: 2018-08-12
 student: Vaibhav Kumar Rai
 organisation: coala

_reports/VamshiKrishna.md

@@ -4,7 +4,6 @@ categories:
   - 2018
   - StatusReport
 date: 2018-08-12
-report_year: '2018'
 student: Vamshi Krishna Bommerla
 organisation: coala
 organisation_link: https://coala.io

_reports/example.md

@@ -11,7 +11,6 @@ organisation_link: https://coala.io
 project: <project title>
 date: YYYY-MM-DD
 project_link: <project link>
-report_year: <year of completing GSoC>
 tarball: <tarball of patches' link>
 sha256sum: <sha256sum of tarball>
 mentors: >

_reports/ishanSrt.md

@@ -7,7 +7,6 @@ date: 2018-08-14
 student: Ishan Srivastava
 organisation: coala
 organisation_link: https://coala.io
-report_year: 2018
 project: Quickstart Green Mode
 project_link: https://summerofcode.withgoogle.com/projects/#5792652830703616
 tarball: https://cdn.rawgit.com/ishanSrt/ishanSrt.github.io/443d578d/ishanSrt.tar.gz

_reports/kriti21.md

@@ -3,7 +3,6 @@ categories:
   - GSoC
   - 2018
   - StatusReport
-report_year: 2018
 date: 2018-08-13
 student: Kriti Rohilla
 organisation: coala

_reports/ksdme.md

@@ -7,7 +7,6 @@ date: 2018-08-12
 student: Kilari Teja
 organisation: coala
 organisation_link: https://coala.io
-report_year: 2018
 project: coala language server
 project_link: https://summerofcode.withgoogle.com/projects/#4971369184362496
 tarball: https://github.com/ksdme/GSoCReport/raw/master/ksdme_coala.tar.gz

_reports/li-boxuan.md

@@ -7,7 +7,6 @@ date: 2018-08-12
 student: Boxuan Li
 organisation: coala
 organisation_link: https://coala.io
-report_year: 2018
 project: Meta-review
 project_link: https://summerofcode.withgoogle.com/projects/#5188493739819008
 tarball: https://github.com/li-boxuan/GSoCReport/raw/master/li-boxuan_coala.tar.gz