Remove JHU cum/7dav signals from documentation

[carlynvandyke]

Per Roni's request. Addresses #1527

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[melange396]

looks good, but we should also remove the similarly-named signals from indicator-combination and usa-facts:

delphi-epidata/docs/api/covidcast-signals/usa-facts.md

Lines 24 to 29 in 8cfb191

	| `confirmed_cumulative_num` and `confirmed_7dav_cumulative_num`| Cumulative number of confirmed COVID-19 cases <br/> **Earliest date available:** 2020-01-25 & 2020-02-01 |
	| `confirmed_cumulative_prop` and `confirmed_7dav_cumulative_prop`| Cumulative number of confirmed COVID-19 cases per 100,000 population <br/> **Earliest date available:** 2020-01-25 & 2020-02-01 |
	| `confirmed_incidence_num` and `confirmed_7dav_incidence_num` | Number of new confirmed COVID-19 cases, daily <br/> **Earliest date available:** 2020-01-25 & 2020-02-01 |
	| `confirmed_incidence_prop` and `confirmed_7dav_incidence_prop` | Number of new confirmed COVID-19 cases per 100,000 population, daily <br/> **Earliest date available:** 2020-01-25 & 2020-02-01 |
	| `deaths_cumulative_num` and `deaths_7dav_cumulative_num`| Cumulative number of confirmed deaths due to COVID-19 <br/> **Earliest date available:** 2020-01-25 & 2020-02-01 |
	| `deaths_cumulative_prop` and `deaths_7dav_cumulative_prop`| Cumulative number of confirmed due to COVID-19, per 100,000 population <br/> **Earliest date available:** 2020-01-25 & 2020-02-01 |

delphi-epidata/docs/api/covidcast-signals/indicator-combination.md

Lines 210 to 215 in 8cfb191

	| `confirmed_cumulative_num` | `confirmed_7dav_cumulative_num` | Cumulative number of confirmed COVID-19 cases <br/> **Earliest date available:** 2020-02-20 |
	| `confirmed_cumulative_prop` | `confirmed_7dav_cumulative_prop`| Cumulative number of confirmed COVID-19 cases per 100,000 population <br/> **Earliest date available:** 2020-02-20 |
	| `confirmed_incidence_num` | `confirmed_7dav_incidence_num` | Number of new confirmed COVID-19 cases, daily <br/> **Earliest date available:** 2020-02-20 |
	| `confirmed_incidence_prop` | `confirmed_7dav_incidence_prop` | Number of new confirmed COVID-19 cases per 100,000 population, daily <br/> **Earliest date available:** 2020-02-20 |
	| `deaths_cumulative_num` | `deaths_7dav_cumulative_num` | Cumulative number of confirmed deaths due to COVID-19 <br/> **Earliest date available:** 2020-02-20 |
	| `deaths_cumulative_prop` | `deaths_7dav_cumulative_prop` | Cumulative number of confirmed due to COVID-19, per 100,000 population <br/> **Earliest date available:** 2020-02-20 |